PT-2025-49753 · Linux · Linux Kernel

Published 2023-02-02 · Updated 2026-02-24 · CVE-2023-53862

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

AV:L/AC:L/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.1.0-rc7-syzkaller-00190-g97ee9d1c1696

Description The Linux kernel contains a flaw within the hfs module related to reference counting of hfs bnode structures. Specifically, a missing call to hfs bnode get() after finding a node in hfs bnode create leads to a premature decrement of the reference count in hfs bnode put(), triggering a kernel BUG. This occurs during file write operations, potentially impacting system stability. The issue was identified through Syzbot testing and involves a path where a node is allocated, used, and then its reference count is incorrectly decremented to zero before it is fully utilized. The vulnerable code is located in fs/hfs/bnode.c.

Recommendations Update the Linux kernel to a version after 6.1.0-rc7-syzkaller-00190-g97ee9d1c1696.

Exploit

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2026-01456

CVE-2023-53862

SUSE-SU-2026:0263-1

SUSE-SU-2026:0316-1

SUSE-SU-2026:0317-1

SUSE-SU-2026:0411-1

SUSE-SU-2026:0617-1

Affected Products

Linux Kernel

References · 1119

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53862.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-53862 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-53862 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53862 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53862 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01456 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-53862 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53862 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0316-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53862 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53862 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0411-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0263-1 · Vendor Advisory